White



(No Model.)

- G. W. WHITE, Decd.

G. H. WHITE, Administrator. DOOR FOR GATGH BASINS 0E STREET SEWERS.

No. 472,567. Patented Apr. 12, 1892.

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MT11E55 a5 UNITED STATES PATENT OFFICE.

GEORGE H." WHITE, OF sAN FRANCISCO, CALIFORNIA, ADMINIsTRATOR OE GEORGE WASHINGTON WHITE, DECEASED.

DOOR FOR CATCH-BASINS OF STREET-SEWERSE SPECIFICATION forming part of Letters Patent No. 472,567, dated April 12, 1892.

Application filed February 26, 1891- Serial No. 382,915- (No model.)

To all whom it may concern.-

Be it known that GEORGE WASHINGTON WHITE, deceased, late a resident of the city and county of San Francisco, State of California, did invent a new and useful Improvement in Doors for Catch-Basins of Street-Sewers, of which the following is a specification.

This invention relates to that class of doors or shutters employed at the inlet of catch-basins of street sewers to prevent the escape of foul or noxious gases, and also to prevent dbris of the streets from entering the catchbasin and choking the sewer.

The invention consists in the construction and combination of parts hereinafter described, and pointed out in the claims.

The accompanying drawings, that form part of this specification, are referred to by letters.

Figure 1 shows the device in front elevavation with the door closed. Fig. 2 represents a transverse vertical section through the middle of the door. the door. Fig. 4 isatop view of the door with the guides in section.

Ais designed to representthe grating-frame, cast with grating-bars B B, which are set in the curbing of the sidewalk above the manhole plate or cover in the usual way. The ends of the frame are cast with vertical ways or grooves O C, in which the door or shutter slides freely up and down, and the door can only be removed when in position by removing the grating-frame bodily from the curbing. Half-round grooves or guides P P are also made in the front faces of the vertical bars of the frame, which correspond with projections D on the inner face of the door or shutter and permit easy movement of the door with- Fig. 3 shows a back view of.

notch or opening H in the lower edge of the door, in which position it will rest on the upper face of the lower bar A of the grateframe and lock the gate 'or door and prevent it from falling down until the catch is :released. To provide for easy movement of the bent arm H*, a guiding-notch I is made in the lower bar of the grate-frame, and when the door is dropped or opened the end of the bent arm 11* will move in the guide, and, riding upon its rounded face, will be pushed back until it passes the top of the lower horizontal bar, when the weight 1-1 will cause the arm H* to engage the top of said bar.

In order to raise and shut the door or shutter, a pinch-bar or other implement is employed, the end of which enters a cup-shaped notch or rabbet J, cast in the front face of the door, and a lug J X is thereby formed on the rear face of the door, against which the weighted lever falls in its backward movement, forming a stop. When the door is raised, as shown, and it is desired to lower or drop it, the exposed end of arm II* is pushed back through the notch I and the door will drop of its own weight, and when it is desired to raise ita crowbar or other suitable implement is inserted in the hole J, and the door is pulled up until the arm 11* engages the notch I, which it does automatically by reason of the weight H It will thus be seen that by this invention a door, gate, or shutter is produced for catchbasins of sewers of great utility and one which is easily operated.

Having thus described the invention, what is claimed, and desired to be secured by Lettors Patent, is-

1. The combination, with the sliding door, gate, or shutter, of grating-bars having vertical grooves or guides, and half-round projections on the gate or shutter corresponding nor specified. with and operating in said guides or grooves, In testimony that I claim the foregoing I 15 as set forth and specified. have hereunto set my hand this 6th day of 5 2. The combination of a gratin g-fraine and February, 1891.

1 "o" '0". I e v a 1 H Weighted lever attached to the 1nner face %Z5Z Z Z5 of {hell 6 Gem-la thereof, provided with a bent ar1n,a notch in lower member of the grate-frame, in the man- IO the lower edge of the door through which the Witnesses:

end of the Weighted arm passes and holds it C. \V. M. SMITH, in a closed position by engaging with the i CHAS. E. KELLY. 

